Research tracks / Direct SUSY searches

Coordinator: Sara Strandberg

In SUSY, every SM particle has a hitherto unobserved superpartner with similar properties but with a spin that differs by half a unit. The fact that the scalar Higgs boson is related to a fermion implies that the Higgs boson mass is protected by chiral symmetry. The new particles that remove the dominant source of fine-tuning are the superpartners of the top quark, the scalar top squarks (stops).

 

Research tracks / Direct compositeness searches

Coordinator: Elin Bergeås Kuutmann

In compositeness, the Higgs boson is a composite pseudo-Nambu-Goldstone boson (pNGB), arising upon the spontaneous breaking of a global symmetry in a new strongly coupled sector. Thus, in compositeness, the Higgs boson mass is protected by a Goldstone shift symmetry. The new particles that remove the dominant source of fine-tuning are vector-like additional top quarks.

 

Research tracks / Indirect searches

Coordinator: Jörgen Sjölin

If the mass of the top partners and other particles is too high for direct detection, the only observational link remaining is the residual interactions causing the couplings between SM particles to be modified as well as new couplings to arise. The high energy interactions can thus be described at low energies in a model-independent way using effective field theory (EFT). In EFT the details of the high mass physics are integrated out of the theory and what remains is a limited set of effective operators with associated constant coefficients.